Home > Article > Web Front-end > ReactJs基础_html/css_WEB-ITnose
ReactJs基础_html/css_WEB-ITnose
- WBOYOriginal
- 2016-06-21 08:58:041395browse
-
因项目某些页面需要重构, 使用了ReactJs, 所以做了一些小demo
-
源码地址,含有wiki
1.JSX使得在模板插入js变量
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> //JSX 允许直接在模板插入 JavaScript 变量。如果这个变量是一个数组，则会展开这个数组的所有成员 var arr = [ <h1> Hellow, Pan </h1>, <h2> I like React very much! </h2>, ]; ReactDOM.render( <div>{arr}</div>, document.getElementById('example') ); </script> </body></html> 2.ReactDomTest
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> ReactDOM.render( <h1>Hello, world!</h1>, document.getElementById('example') ); </script> </body></html> 3.使用JSX支持JS与HTML混用
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> var names = ['Shine', 'Pans', 'Panshang']; //jsx可以让html和js混用, <>是html, {}是js ReactDOM.render( <div> { names.map(function (name){ return <div> Hello, {name}!</div> }) } </div>, document.getElementById('example') ); </script> </body></html> 4.创建组件
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> //HelloMessage 是一个组件类。模板插入 <HelloMessage /> 时，会自动生成 HelloMessage 的一个实例 var HelloMessage = React.createClass({ render: function(){ return <h1>Hello, {this.props.name}</h1>; } }); ReactDOM.render( <HelloMessage name = "Pan" />, document.getElementById('example') ); </script> </body></html> 5.使用属性 props
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> //NoteList 组件有两个 span 子节点，它们都可以通过 this.props.children 读取 var NotesList = React.createClass({ render: function() { return ( <ol> { React.Children.map(this.props.children, function (child) { return <li>{child}</li>; }) } </ol> ); } }); ReactDOM.render( <NotesList> <span>hello</span> <span>Pan! </span> </NotesList>, document.body ); </script> </body></html> 6.PropsType
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> var MyTitle = React.createClass({ //要求title的属性的data类型是string,只能是string propTypes: { title: React.PropTypes.string.isRequired, }, render: function() { return <h1> {this.props.title} </h1>; } }); //测试部分, 将title属性设置成 int类型, 然后会报错 //将123用引号包起来标示为字符串类型将不在报错 var data = 123; ReactDOM.render( <MyTitle title = {data} />, document.body ); </script> </body></html> 7.使用默认属性 GetDefaultProps
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> //获取默认的属性 //获取的是title的值 var MyTitle = React.createClass({ getDefaultProps : function () { return { title : 'shinepans' }; }, render: function() { return <h1> {this.props.title} </h1>; } }); ReactDOM.render( <MyTitle />, document.body ); </script> </body></html> 8.获取真实dom
<!DOCTYPE html><html> <head> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> var MyComponent = React.createClass({ handleClick: function() { //监听点击事件, 聚焦输入框 this.refs.myTextInput.focus(); }, render: function() { return ( <div> <input type="text" ref="myTextInput" /> <input type="button" value="Focus the text input" onClick={this.handleClick} /> </div> ); } }); ReactDOM.render( <MyComponent />, document.getElementById('example') ); </script> </body></html> 9.通过State改变状态
<!DOCTYPE html><html> <head> <meta charset="utf-8")> </meta> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> var LikeButton = React.createClass({ getInitialState: function() { return {liked: false}; }, handleClick: function(event) { this.setState({liked: !this.state.liked}); }, //转换状态, 喜欢或不喜欢 render: function() { var text = this.state.liked ? '喜欢了' : '还没喜欢'; return ( <p onClick={this.handleClick}> 你{text}这个.点击文本改变你的状态. </p> ); } }); ReactDOM.render( <LikeButton />, document.getElementById('example') ); </script> </body></html> 10.使用表单监听,更好的用户交互
<!DOCTYPE html><html> <head> <meta charset="utf-8")> </meta> <script src="../build/react.js"></script> <script src="../build/react-dom.js"></script> <script src="../build/browser.min.js"></script> </head> <body> <div id="example"></div> <script type="text/babel"> //监听textarea的变化, 变化了就更新p标签里的内容 //下面初始化了 输入框和p的初始值 var Input = React.createClass({ getInitialState: function() { return {value: '请在文本框输入文本'}; }, handleChange: function(event) { this.setState({value: event.target.value}); }, render: function () { var value = this.state.value; return ( <div> <textarea rows="10" cols="30" value={value} onChange={this.handleChange} /> <p>{value}</p> </div> ); } }); ReactDOM.render(<Input/>, document.body); </script> </body></html> 11.使用JSBIn 直接在浏览器运行,调试JSX 很方便
- JSBib网址
令文字渐变效果, 使用了props, 计时器等, 源码参考开始时给出的源代码地址
by: 潘尚
time: 2016.1.30
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：自助建站系统可以做企业网站吗?_html/css_WEB-ITnoseNext article：纯CSS实现一,二级菜单_html/css_WEB-ITnose